<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>内置对象</title>
</head>

<body>
    <script type="text/javascript">
        //Math对象 
        //使用方式 Math.属性 Math.方法()
        console.log(Math.PI);
        console.log
    </script>
</body>

</html>